source/libs/gmp/gmp-src/mpn/powerpc64/com.asm

   1 dnl  PowerPC-64 mpn_com.
   2
   3 dnl  Copyright 2004, 2005, 2013 Free Software Foundation, Inc.
   4
   5 dnl  This file is part of the GNU MP Library.
   6 dnl
   7 dnl  The GNU MP Library is free software; you can redistribute it and/or modify
   8 dnl  it under the terms of either:
   9 dnl
  10 dnl    * the GNU Lesser General Public License as published by the Free
  11 dnl      Software Foundation; either version 3 of the License, or (at your
  12 dnl      option) any later version.
  13 dnl
  14 dnl  or
  15 dnl
  16 dnl    * the GNU General Public License as published by the Free Software
  17 dnl      Foundation; either version 2 of the License, or (at your option) any
  18 dnl      later version.
  19 dnl
  20 dnl  or both in parallel, as here.
  21 dnl
  22 dnl  The GNU MP Library is distributed in the hope that it will be useful, but
  23 dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  24 dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  25 dnl  for more details.
  26 dnl
  27 dnl  You should have received copies of the GNU General Public License and the
  28 dnl  GNU Lesser General Public License along with the GNU MP Library.  If not,
  29 dnl  see https://www.gnu.org/licenses/.
  30
  31 include(`../config.m4')
  32
  33 C                  cycles/limb
  34 C POWER3/PPC630          ?
  35 C POWER4/PPC970          1.25
  36 C POWER5                 ?
  37 C POWER6                 1.32
  38 C POWER7                 1.13
  39
  40 C INPUT PARAMETERS
  41 define(`rp',    `r3')
  42 define(`up',    `r4')
  43 define(`n',     `r5')
  44
  45 ASM_START()
  46 PROLOGUE(mpn_com)
  47
  48 ifdef(`HAVE_ABI_mode32',
  49 `       rldicl  n, n, 0,32')
  50
  51         cmpdi   cr0, n, 4
  52         blt     L(sml)
  53
  54         addi    r10, n, 4
  55         srdi    r10, r10, 3
  56         mtctr   r10
  57
  58         andi.   r0, n, 1
  59         rlwinm  r11, n, 0,30,30
  60         rlwinm  r12, n, 0,29,29
  61         cmpdi   cr6, r11, 0
  62         cmpdi   cr7, r12, 0
  63
  64         beq     cr0, L(xx0)
  65 L(xx1): ld      r6, 0(up)
  66         addi    up, up, 8
  67         nor     r6, r6, r6
  68         std     r6, 0(rp)
  69         addi    rp, rp, 8
  70
  71 L(xx0): bne     cr6, L(x10)
  72 L(x00): ld      r6, 0(r4)
  73         ld      r7, 8(r4)
  74         bne     cr7, L(100)
  75 L(000): addi    rp, rp, -32
  76         b       L(lo0)
  77 L(100): addi    up, up, -32
  78         b       L(lo4)
  79 L(x10): ld      r8, 0(r4)
  80         ld      r9, 8(r4)
  81         bne     cr7, L(110)
  82 L(010): addi    up, up, 16
  83         addi    rp, rp, -16
  84         b       L(lo2)
  85 L(110): addi    up, up, -16
  86         addi    rp, rp, -48
  87         b       L(lo6)
  88
  89 L(sml): mtctr   n
  90 L(t):   ld      r6, 0(up)
  91         addi    up, up, 8
  92         nor     r6, r6, r6
  93         std     r6, 0(rp)
  94         addi    rp, rp, 8
  95         bdnz    L(t)
  96         blr
  97
  98         ALIGN(32)
  99 L(top): nor     r6, r6, r6
 100         nor     r7, r7, r7
 101         std     r6, 0(rp)
 102         std     r7, 8(rp)
 103 L(lo2): ld      r6, 0(up)
 104         ld      r7, 8(up)
 105         nor     r8, r8, r8
 106         nor     r9, r9, r9
 107         std     r8, 16(rp)
 108         std     r9, 24(rp)
 109 L(lo0): ld      r8, 16(up)
 110         ld      r9, 24(up)
 111         nor     r6, r6, r6
 112         nor     r7, r7, r7
 113         std     r6, 32(rp)
 114         std     r7, 40(rp)
 115 L(lo6): ld      r6, 32(up)
 116         ld      r7, 40(up)
 117         nor     r8, r8, r8
 118         nor     r9, r9, r9
 119         std     r8, 48(rp)
 120         std     r9, 56(rp)
 121         addi    rp, rp, 64
 122 L(lo4): ld      r8, 48(up)
 123         ld      r9, 56(up)
 124         addi    up, up, 64
 125         bdnz    L(top)
 126
 127 L(end): nor     r6, r6, r6
 128         nor     r7, r7, r7
 129         std     r6, 0(rp)
 130         std     r7, 8(rp)
 131         nor     r8, r8, r8
 132         nor     r9, r9, r9
 133         std     r8, 16(rp)
 134         std     r9, 24(rp)
 135         blr
 136 EPILOGUE()